Rapidly modifying microstructure and mechanical properties of AA7150 Al alloy processed with electropulsing treatment

作     者：Kai Chen Lihua Zhan Wenfang Yu Kai Chen;Lihua Zhan;Wenfang Yu

作者机构：College of Mechanical and Electrical Engineering of Central South UniversityChangsha 410083China State Key Laboratory of High-Performance Complex ManufacturingCentral South UniversityChangsha 410083China Light Alloy Research Institute of Central South UniversityChangsha 410083China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第95卷第36期

页      面：172-179页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the Fundamental Research Funds for the National Key R&D Program of China(No.2017YFB0306300) the Hunan Provincial Innovation Foundation for Postgraduate(No.CX20200185) the Fundamental Research Funds for the Central Universities of Central South University(No.2020zzts098) the National Natural Science Foundation of China(Nos.19055551,51675538 and 51601060) 

主　　题：AA7150 Al alloy Electropulsing treatment Rapid dissolution Recrystallization Dislocation 

摘      要：Studies show that the proper solid solution treatment(SST)is a key step in the precipitation strengthening of AA7150 Al *** the superior characteristics of the fully dissolved phase,it has major drawbacks,including high consumption of energy and low ***,electropulsing treatment(EPT)has been proposed to study dissolved precipitations and modify microstructures of AA7150 Al alloy faster than conventional *** have been conducted in the present article,and the obtained results show that EPT can promote the rapid dissolution of theη’phase at relatively low temperatures in only 20 ***,the strength and ductility of electropulsed samples decrease *** with conventional SST,EPT accelerates recrystallization and obtains relatively fine grains after 20 and 50 s electric ***,as the EPT time increases,the corresponding non-uniform local heating and the electron force promote dislocation generation and annihilation.